.dropnav {
    margin: -6px 0 0 0;
    display: flex;
    width: 100%;
}

.dropnav .dropnav1 {
    flex: 1;
    height: 160px;
    background-color: #555;
    border-right: 1px solid #666;
}

.dropnav .dropnav1:nth-child(5) {
    border-right: none;
}

.chart {
    background-color: #fff;
}

.c_top {
    margin-top: 12px;
    height: 35px;
}

.c_top::before {
    display: inline-block;
    content: '家用电器';
    line-height: 35px;
    font-size: 26px;
    font-weight: 700;
    color: #b1191a;
    margin-left: 10px;
}

.c_top ul {
    float: right;
}

.c_top li {
    /* height: 40px; */
    font-size: 13px;
    float: left;
    line-height: 35px;
    margin: auto 5px;
    color: #666;
}

.c_top li:hover {
    color: red;
}

.c_top ul li:first-child {
    color: red;
}

.c_bottom {
    border-right: 1px solid #ccc;
    border-top: 2px solid #b1191a;
    display: flex;
    height: 370px;
}

.box {
    display: flex;
    flex-direction: column;
    border-left: 1px solid #ccc;
}

.a {
    flex: 1;
    height: 100%;
    width: 100%;
    border-bottom: 1px solid #ccc;
    transition: all .4s;
}

.a:hover {
    background-position: 10px 0 !important;
}

.goods {
    display: flex;
    flex-wrap: wrap;
    width: 100%;
    height: 820px;
    justify-content: space-between;
    align-content: flex-end;
}

.b {
    position: relative;
    top: 0px;
    width: 290px;
    height: 400px;
    border: 1px solid#999;
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    transition: all .4s;
}

.b:hover {
    top: -10px;
}

.b_a {
    flex: 3;
    border-bottom: 1px solid #999;
}

.b_b {
    flex: 1;
}

.b_b p {
    margin: 10px 15px auto;
    color: #666;
}

#aa {
    float: left;
    height: 273.5px;
}

.box:nth-child(n) {
    flex: 4;
}

.box:nth-child(2) {
    flex: 6;
}

#c .box:nth-child(n) {
    flex: 15;
}

#c .box:nth-child(2) {
    flex: 14;
}

.boxaa {
    width: 93px;
    text-align: center;
    margin: 0 6px;
    float: left;
    /* border-bottom: 1px solid#ccc; */
    line-height: 30px;
}

.boxaa:hover {
    color: red;
}


/* background-position: -257px -105px; */